Quinolines, Polyquinolines, Molecular Segments of Fullerenes and Graphene Nanoribbons, and Graphene Nanoribbons and Methods of Their Synthesis
US-2021230118-A1 · Jul 29, 2021 · US
Ring systems of three rings
Ring systems of three rings · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C07D221/06 |
| Official title | Ring systems of three rings |
| Display label | Ring systems of three rings |
| Total patents | 94 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 14 |
| 2016 | 5 |
| 2017 | 9 |
| 2018 | 4 |
| 2019 | 11 |
| 2020 | 12 |
| 2021 | 10 |
| 2022 | 7 |
| 2023 | 13 |
| 2024 | 6 |
| 2025 | 1 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Selective inhibitors of gentotoxic steress-induced IKK/NF-κB pathways
US-11028084-B2 · Jun 8, 2021 · US
Compound and composition for forming organic film
US-11022882-B2 · Jun 1, 2021 · US
Cannabinergic nitrate esters and related analogs
US-10968206-B2 · Apr 6, 2021 · US
Quinolines, polyquinolines, molecular segments of fullerenes and graphene nanoribbons, and graphene nanoribbons and methods of their synthesis
US-10899711-B2 · Jan 26, 2021 · US
Compound and dimer complex embodiments for supramolecular sensing
US-2020407318-A1 · Dec 31, 2020 · US
Novel n-hydroxyethyl didehydroazapodophyllotoxins as gbp1 inhibitors and methods of overcoming treatment resistance in cancer
US-2020375977-A1 · Dec 3, 2020 · US
Azulene ring-containing compound, its use, and an organic photoelectric device including the same
US-2020377467-A1 · Dec 3, 2020 · US
Process for the manufacture of (2s,3s,4s,5r,6s)-3,4,5-trihydroxy-6-(((4ar,10ar)-7-hydroxy-1-propyl-1,2,3,4,4a,5,10,10a-octahydrobenzo[g]quinolin-6-yl)oxy)tetrahydro-2h-pyran-2-carboxylic acid
US-2020369706-A1 · Nov 26, 2020 · US
Tricyclic compounds as histone methyltransferase inhibitors
US-2020361896-A1 · Nov 19, 2020 · US
Organic compound
US-10804470-B2 · Oct 13, 2020 · US
Phosphatase Binding Compounds and Methods of Using Same
US-2020268897-A1 · Aug 27, 2020 · US
Inhibitors of kidney-type glutaminase, gls-1
US-2020216448-A1 · Jul 9, 2020 · US
Oxygen scavengers, compositions comprising the scavengers, and articles made from the compositions
US-2020131334-A1 · Apr 30, 2020 · US
Aqueous Na-ion redox flow battery with ceramic NaSICON membrane
US-10586997-B1 · Mar 10, 2020 · US
Inhibitors of kidney-type glutaminase, GLS-1
US-10526322-B2 · Jan 7, 2020 · US
Benzoquinolone inhibitors of vmat2
US-2020000794-A1 · Jan 2, 2020 · US
Compound and composition for forming organic film
US-2019391493-A1 · Dec 26, 2019 · US
Organic Electroluminescence Device
US-2019372030-A1 · Dec 5, 2019 · US
Organic compound
US-2019355909-A1 · Nov 21, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07D221/06?
- CPC C07D221/06 is the Cooperative Patent Classification code for “Ring systems of three rings.”
- How many patents are filed under CPC C07D221/06 (Ring systems of three rings)?
- Our database includes 94 publications tagged with this CPC code.
- Is patent activity under CPC C07D221/06 growing?
- Publication counts under this code: 6 in 2024 vs 1 in 2025 (latest complete years).